The normal MCS-150 filing deadline can be calculated from a company’s USDOT number.
However, that calculation is only the starting point.
A recent accepted update may already satisfy the scheduled requirement. A change in company information may create a separate obligation. And FMCSA’s 2026 temporary enforcement suspension affects certain deadlines during the Motus transition.
For carriers and other USDOT registrants, the most reliable approach is to review the deadline, filing history, and actual registration status together.
What Does an MCS-150 Update Do?
The MCS-150 Motor Carrier Identification Report maintains company information associated with the USDOT number.
It includes the legal business name, DBA, physical and mailing addresses, operating classification, cargo types, power units, drivers, and mileage.
An accepted update helps keep the federal registration record accurate.
It does not grant operating authority or renew UCR.
Step 1: Locate Your USDOT Number
Find the number assigned to the legal business.
Use official FMCSA records to confirm that it belongs to the correct entity.
Do not use another carrier’s USDOT number.
If the company already has a number, do not create a duplicate registration merely because its information needs updating.
Step 2: Identify the Filing Month
The final USDOT digit determines the month.
| Last digit | Due month |
| 1 | January |
| 2 | February |
| 3 | March |
| 4 | April |
| 5 | May |
| 6 | June |
| 7 | July |
| 8 | August |
| 9 | September |
| 0 | October |
The normal deadline is the last day of the assigned month.
Step 3: Determine the Filing Year
Look at the second-to-last USDOT digit.
If it is odd, the scheduled update falls in odd-numbered years.
If it is even, the scheduled update falls in even-numbered years.
For example, a number ending in 48 is normally due in August of even-numbered years.
A number ending in 31 is normally due in January of odd-numbered years.
Step 4: Check the Last Accepted Update
A company may have filed an MCS-150 after changing its address, fleet, or operations.
FMCSA counts a qualifying MCS-150 or MCS-150C filing completed during the 12 months immediately preceding the scheduled deadline as satisfying that biennial update.
Review the accepted update date rather than relying only on when a form was submitted.
A filing outside that qualifying window does not automatically satisfy the upcoming deadline.
Step 5: Check Whether Company Information Changed
Review the legal name, DBA, address, phone number, email, operation type, cargo categories, reported power units, drivers, and mileage.
FMCSA requires registration information to be updated within 30 days of a change.
Some transactions, including certain legal entity changes, may need special documentation or a different process.
Do not assume that every change can be handled through an ordinary biennial filing.
Step 6: Determine Whether Temporary Relief Applies
FMCSA’s September 10, 2026 notice temporarily suspended enforcement of biennial updates and related USDOT-number inactivation for updates due on or after June 1, 2026.
Affected registrants have additional time.
The underlying update requirement remains.
A business should monitor official instructions before deciding what filing action to take.
Step 7: Verify the Actual USDOT Status
Use FMCSA’s official public registration search.
Confirm whether the USDOT number is active or inactive.
If inactive, identify the reason.
The 2026 temporary suspension does not automatically reverse a prior inactivation or resolve unrelated registration problems.
Do not infer inactive status solely from an overdue filing date.
Step 8: Select the Correct Registration Transaction
FMCSA uses the MCS-150 series for applicable company registration updates.
Depending on the entity, the form may be MCS-150, MCS-150B, or MCS-150C.
The correct submission method depends on the requested action.
Use the current FMCSA registration forms page rather than an outdated filing tutorial.
Step 9: Understand the Motus Transition
FMCSA launched Motus on May 19, 2026.
The agency’s registration processes and account-management procedures changed during the transition.
Some actions may use online account tools, while others require a support ticket and supporting documentation.
Follow the current official instructions for the particular transaction.
Step 10: Submit Accurate Information
Before submitting, confirm that the reported information matches the business’s actual records.
Avoid changing the fleet count or mileage merely to influence public safety information.
Provide supporting documentation when required.
Retain the submission confirmation.
Step 11: Confirm the Update Was Accepted
A submitted form is not necessarily a completed filing.
Review the updated federal registration record after processing.
Check the accepted update date and corrected company details.
If FMCSA rejects the submission, resolve the identified problem through the appropriate channel.
Step 12: Review SAFER and Other Records
The SAFER Company Snapshot displays public company information and available safety data.
An MCS-150 correction may update company information shown publicly.
It does not automatically remove valid inspection or crash information.
Eligible safety data disputes generally belong in DataQs.
Does a Missed Filing Automatically Inactivate Your USDOT Number?
Not under every circumstance.
The normal enforcement framework allows inactivation for failure to complete required updates.
However, FMCSA suspended related inactivation for updates due on or after June 1, 2026, during the current relief period.
Verify the actual status before taking corrective action.
What If Your USDOT Number Is Inactive?
Determine the reason for inactivation.
A missed update, voluntary inactivation, or another registration issue may require different steps.
FMCSA provides reactivation procedures.
An MCS-150 filing does not necessarily reinstate separate operating authority.
Does a Recent Filing Change the Next Due Date?
Not permanently.
The assigned filing month and odd/even-year cycle are based on the USDOT number.
A qualifying update within the preceding 12 months can satisfy a particular scheduled deadline.
It does not permanently move the company’s filing month to the date of the recent update.
Does the MCS-150 Have a Government Filing Fee?
FMCSA lists no federal processing fee for a routine biennial update.
A private filing service may charge for optional administrative assistance.
The company can use the official government process directly.
Can an MCS-150 Update Affect UCR?
Yes, indirectly.
The UCR Plan has confirmed that certain enrolled 2027 automatic renewals use the power-unit count on the most current MCS-150.
Accurate fleet information may therefore affect the applicable renewal bracket.
However, an MCS-150 update does not complete UCR payment.
Frequently Asked Questions
How do I know if my MCS-150 is due this year?
Check the last two digits of the USDOT number and the accepted filing history.
Can a recent MCS-150 update satisfy my biennial deadline?
Yes, if it qualifies under FMCSA’s preceding 12-month rule.
What if nothing changed?
The normal biennial requirement still applies, subject to current enforcement relief.
What if I missed my 2026 deadline?
First determine whether the deadline falls within FMCSA’s temporary suspension, then verify the actual record.
Can I file directly with FMCSA?
Yes. Official filing methods are available without paying a private assistance fee.
Does MCS-150 renew MC authority or UCR?
No. Both are separate.
Check the Record Before Filing
A correct MCS-150 decision requires more than calculating a calendar date. Filing history, company changes, current status, and FMCSA’s temporary relief all matter.
MOTUS – MCS-150 Prepayment provides private assistance with USDOT record reviews, MCS-150 updates, and related registration administration.
Visit MOTUS – MCS-150 Prepayment or call (800) 924-1130 for assistance reviewing your MCS-150 filing schedule and company information.
MOTUS – MCS-150 Prepayment is a private third-party service and is not affiliated with FMCSA or the U.S. Department of Transportation. Eligible businesses may complete routine government updates directly without paying a private service fee.
